<template>
  <div :class="{ 'hidden': hidden }" class="np-pagination" v-show="total > 0">
    <div class="np-pagination-total">
      共&nbsp;{{ total }}&nbsp;条数据
    </div>
    <el-pagination :background="background" :current-page.sync="currentPage" :page-size.sync="pageSize" :layout="layout"
      :page-sizes="pageSizes" :total="total" v-bind="$attrs" @size-change="handleSizeChange" :pager-count="pagerCount"
      @current-change="handleCurrentChange" />
  </div>
</template>

<script>
import { scrollTo } from '@/utils/scroll-to'

export default {
  name: 'NpPagination',
  props: {
    total: {
      required: true,
      type: Number
    },
    page: {
      type: Number,
      default: 1
    },
    limit: {
      type: Number,
      default: 20
    },
    pageSizes: {
      type: Array,
      default() {
        return [10, 20, 30, 50, 100, 200]
      }
    },
    pagerCount: {
      type: Number,
      default: 5, // 大于等于 5 且小于等于 21 的奇数
    },
    layout: {
      type: String,
      default: 'total, sizes, prev, pager, next, jumper'
    },
    background: {
      type: Boolean,
      default: true
    },
    autoScroll: {
      type: Boolean,
      default: true
    },
    hidden: {
      type: Boolean,
      default: false
    }
  },
  computed: {
    currentPage: {
      get() {
        return this.page
      },
      set(val) {
        this.$emit('update:page', val)
      }
    },
    pageSize: {
      get() {
        return this.limit
      },
      set(val) {
        this.$emit('update:limit', val)
      }
    }
  },
  methods: {
    handleSizeChange(val) {
      this.$emit('pagination', { page: this.currentPage, limit: val })
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    },
    handleCurrentChange(val) {
      this.$emit('pagination', { page: val, limit: this.pageSize })
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    }
  }
}
</script>

<style scoped lang="scss">
.np-pagination {
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 24px 20px 0;

  &.hidden {
    display: none;
  }

  &::v-deep {
    .el-pagination {
      padding: 0 !important;
    }

    .el-pagination__total {
      display: none !important;
    }
  }

  .np-pagination-total {
    padding-right: 10px;
    font-size: 14px;
    line-height: 18px;
    color: rgba(0, 0, 0, 0.6);
  }
}
</style>
